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eyepea

macrumors member
Original poster
Jul 20, 2012
91
0
I noticed when I put some Arctic Silver 5 on the heat sink of my newly acquired 2012 MM i7 2.6Ghz that the sink is not as flush as it should be. I have a few MMs and have notice the heat sink (and their surfaces) is somewhat unrefined for what you would expect from Apple.

I am wondering what thermal compound (heat sink paste) you use for the MM (or similar where the sink and surface of the processor are not perfect).

I sm using AS5 but am looking for a better compound. I know AS5 is good but there are better compounds for situations when the sink and surface are not perfect.

Any thoughts.

IP
 
Thermal pastes in general are meant to fill the imperfections, if everything were polished to a mirror finish and fit perfectly, you wouldn't need them. Also, you tighten the screws of heat sinks in a cross-wise fashion, otherwise they may not sit perfectly on the chips or break something due to uneven pressure.

Having said that, I'm using Arctic Cooling MX-4, because unlike AS5, it's non-conducting.
 
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Using non-conductive thermal pastes for CPUs on notebooks and extreme small form factor based machines is a really good idea. Arctic Silver 5 works well but it is really designed for use with the normal sized boards and processors. If any of that paste bleeds over onto the surrounding board circuitry and causes a short you could be SOL. Another problem is that that paste is very difficult to wipe completely off if it spills over and gets on other components. If you have already applied the Arctic Silver and it works ok then I would leave it alone. If for some reason you need to remove the paste or reapply paste then I believe Arctic Silver sells a removal compound that helps remove their thermal paste or other thermal pastes from surfaces. As an alternative to using the silver paste I used the Arctic ceramic paste on my notebook heatsink/CPU because it is non-conductive.
 
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I have a Mac Mini and the thermal paste was a problem for many years.Two years ago, I decided to use the K5 PRO and I have no complain since then. If you want to see more details this is a very helpful tutorial
 
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